Sheohar is an administrative district in the state of Bihar in India. The district headquarters are located at Sheohar, and the district is a part of Tirhut Division. This district was carved out of Sitamarhi district in 1994 due to the extreme efforts of Raghunath Jha, former Union Minister. Eminent Hindi Novelist, Dr. Bhagwati Sharan Mishra was the first District magistrate of Sheohar.
The district occupies an area of 443 km² and has a population of 656,246. Sheohar is known for its greenery and cleanliness. Cadamba and teak are the principle trees of this district. Nilgai or blue bull is the regional animal of this area.
This district has a mixed population of Hindus and Muslims. Agriculture is the main stay. It is one of the most flood affected districts in Bihar, due to over flooding of the Bagmati and Budhi Gandak rivers. Devkuli is a holy place popular for ancient temple of lord Shiva. As of 2011 it is the second least populous district of Bihar, after Sheikhpura.